How do I really enable ray tracing in UE 5.1?

sjhalayka · January 6, 2023, 5:26pm

I’ve got an RTX 30 GPU now, and I’m wondering how to enable ray tracing? I tried enabling it in the project settings, and it’s all checked off, but I just don’t think that it’s working. Below is a screenshot of two reflecting objects. The reflection of the reflecting cube does not appear, and the shadow is aliased to death.

RecourseDesign · January 6, 2023, 5:50pm

Hi sjhalayka,

Have you setting the Ray Lighting Mode to Hit Lighting for Reflections?

sjhalayka · January 6, 2023, 6:14pm

Thank you so much.

I believe that made a difference. The shadow is no longer aliased. However, the reflection of the reflecting cube is now pure black. Is there a way to add reflections of reflectors?

Also, when I enable Cast Shadow in the Niagara system details now, it casts a shadow for the whole system, not just the plume of smoke.

Any ideas?

RecourseDesign · January 6, 2023, 6:18pm

Oh - I found I had black objects before turning it to Hit Lighting - and that fixed it.

Perhaps someone with more knowledge about this than me can help?

sjhalayka · January 6, 2023, 6:31pm

Hmm… Interesting. Thanks for your help though.